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2016 IEEE 11th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)最新文献

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A shape memory alloy thick film actuator array for narrow pitched planar tactile display device 一种用于窄斜平面触觉显示装置的形状记忆合金厚膜致动器阵列
Hiroshi Yanatori, T. Mineta, S. Takeuchi, Konomu Abe
This paper presents a MEMS type shape memory alloy (SMA) thick film actuator array for a tactile display which renders texture to human finger skin by mechanical stimulations. We propose a planar tactile display combined with SMA thick film actuator array (5 × 5 array, 1 mm pitch). The deflectable planar spring-shaped SMA actuators with micro-heater circuits were batch-fabricated from a 10-μm thick SMA film. Fabrication process techniques were newly developed, and then the SMA actuator array device was realized. The generated force and displacement of the SMA actuator at high and room temperatures were 40 mN and 25 mN, respectively, at initial deflection of 100 μm. With a bias spring combination, the reversible force generation and displacement can be estimated as 5 mN and 20 μm which are large enough for mechanical stimulation to human skin.
提出了一种用于触觉显示器的MEMS型形状记忆合金(SMA)厚膜致动器阵列,该阵列通过机械刺激使人体手指皮肤呈现纹理。我们提出了一种结合SMA厚膜致动器阵列(5 × 5阵列,1mm间距)的平面触觉显示器。采用10 μm厚的SMA薄膜批量制备了具有微加热电路的可偏转平面弹簧型SMA致动器。开发了新的制造工艺技术,实现了SMA致动器阵列装置。当初始挠度为100 μm时,SMA致动器在高温和室温下产生的力和位移分别为40 mN和25 mN。在偏置弹簧组合下,产生的可逆力和位移估计为5 mN和20 μm,足以对人体皮肤进行机械刺激。
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引用次数: 2
Cubical photonic structures by means of ion beam assisted robotic assembly 离子束辅助机器人装配的立方体光子结构
Waldemar Klauser, S. Zimmermann, M. Bartenwerfer, S. Fatikow
Fabrication of tailored photonic structures with sufficient precision is a major topic in photonics since decades. However, until now, the assembly of photonic structures in order to control light propagation in all three spatial dimensions remains challenging. This paper presents a reliable approach for fabricating three-dimensional structures consisting of individually stacked colloidal particles. The combination of a robotic dual-probe setup inside a scanning electron microscope and the purposeful use of ion beam based etching and deposition techniques allows to fabricate on-demand three-dimensional photonic structures with cubic geometry. The advantages and limits of this technique are highlighted with respect to further application scenarios.
制造具有足够精度的定制光子结构是几十年来光子学的主要课题。然而,到目前为止,组装光子结构以控制光在所有三个空间维度上的传播仍然具有挑战性。本文提出了一种可靠的方法来制造由单独堆叠的胶体粒子组成的三维结构。结合扫描电子显微镜内的机器人双探针装置和基于离子束的蚀刻和沉积技术,可以按需制造具有立方几何形状的三维光子结构。在进一步的应用场景中,强调了该技术的优点和局限性。
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引用次数: 4
Vibration and large deformation simulation analysis of graphene membrane for nanomechanical applications 石墨烯薄膜在纳米机械应用中的振动和大变形模拟分析
Ping Li, Rahman Hebibul, Libo Zhao, Zhikang Li, Yulong Zhao, Zhuangde Jiang
This paper reports an efficient and accurate simulation method for vibrations and deformations of single- and multi-layer graphene membranes. In this method, a graphene membrane is modelled by a 2-D plate element whose thickness is changeable in COMSOL Multiphysics. The graphene is regarded as a linear isotropic elastic material, and the load-deformation behaviour is approximated as a doubly clamped bridge model or a clamped circular membrane. By comparing the simulation results using 2-D plate and another SHELL element with the experiment data respectively, we find that the average errors of 1st-order frequency using 2-D plate and SHELL element for the same membrane are 4% and 43%. Therefore, the simulation method using 2-D plate element is precise and efficient for the nanomechanical analysis of graphene sheets. With the proposed simulation method, the vibrations and nonlinear deformations of the circular and square graphene membranes are analyzed with different dimensions and thicknesses. These simulation results can be the guideline for the nanomechanical device design.
本文报道了一种高效、准确的单层和多层石墨烯膜振动和变形模拟方法。该方法采用COMSOL Multiphysics中厚度可变化的二维板单元对石墨烯薄膜进行建模。石墨烯被认为是一种线性各向同性弹性材料,其载荷变形行为近似为双夹紧桥模型或夹紧圆膜。通过将二维平板和另一种壳体单元的模拟结果与实验数据进行比较,发现对同一膜,二维平板和壳体单元的一阶频率平均误差分别为4%和43%。因此,基于二维板元的模拟方法对石墨烯薄膜的纳米力学分析是精确、高效的。利用所提出的仿真方法,分析了不同尺寸和厚度的圆形和方形石墨烯膜的振动和非线性变形。这些仿真结果可以为纳米机械器件的设计提供指导。
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引用次数: 1
A MEMS piezoelectric in-plane resonant accelerometer with two-stage micro-leverage mechanism 一种两级微杠杆机构的MEMS压电平面内谐振加速度计
Yixiang Wang, Hong Ding, Xianhao Le, Jin Xie
In this paper, we firstly present a MEMS (microelectromechanical systems) piezoelectric in-plane resonant accelerometer with two-stage micro-leverage mechanism. Double ended tuning fork (DETF) resonators are actuated and sensed by piezoelectric transduction with aluminum nitride (AlN). Optimized configuration of DETF resonators and two-stage micro-leverage mechanism are proposed to enhance sensitivity of the resonant accelerometer. The preliminary characterization of the device was tested in a vacuum chamber at the pressure of 4 mTorr. The sensitivity of the device is 28.4Hz/g at the base frequency around 141 kHz (201 ppm/g), which is higher than the previously reported data.
本文首先提出了一种具有两级微杠杆机构的MEMS(微机电系统)压电平面内谐振加速度计。双端音叉(DETF)谐振器是用氮化铝(AlN)压电换能器驱动和传感的。为了提高谐振式加速度计的灵敏度,提出了优化的DETF谐振腔结构和两级微杠杆机构。在4 mTorr压力的真空室中对该器件进行了初步表征。该装置在基频约141 kHz (201 ppm/g)时的灵敏度为28.4Hz/g,高于先前报道的数据。
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引用次数: 2
A design of spring constant arranged for MEMS accelerometer by multi-layer metal technology 采用多层金属技术设计MEMS加速度计的弹簧常数
D. Yamane, T. Konishi, Teruaki Safu, H. Toshiyoshi, M. Sone, K. Masu, K. Machida
We report an approach to design spring constant arranged for MEMS accelerometers fabricated by multi-layer metal technology. The proposed multi-layer metal structure can control the spring constant of serpentine flexure to suspend high-density proof mass. Moreover, the multi-layer metal configuration enables us to obtain high degree of freedom of spring constant design without compromising the performance of the MEMS accelerometer. A proof-of-concept device has been fabricated, and the measured characteristics of the proposed micromechanical springs were consistent with the design values.
本文报道了一种多层金属制造的MEMS加速度计中弹簧常数的设计方法。所提出的多层金属结构可以控制蛇形弯曲的弹簧常数,以悬浮高密度的防块。此外,多层金属结构使我们能够在不影响MEMS加速度计性能的情况下获得弹簧常数设计的高度自由度。制作了一个概念验证装置,所提出的微机械弹簧的测量特性与设计值一致。
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引用次数: 3
Probing crystallography-induced anisotropy and periodic property of atomic friction in MoS2 via fast Fourier transform processing 利用快速傅立叶变换处理探测二硫化钼原子摩擦的晶体诱导各向异性和周期性
M. Li, Lianqing Liu, N. Jiao, Peng Yu, N. Xi, Yuechao Wang
An theoretical and experimental study on friction anisotropy and 120 degree periodicity variation in atomic friction of MoS2 is presented in this paper. To clearly clarify these properties, fast Fourier transform(FFT) is utilized by Matlab software to perform the frequency variation of the actual friction signal wave acquired from the lateral friction experiment. Characteristic of the computed frequency ratios periodically varying with lattice orientation is clearly observed and well explained in terms of the periodical variation in atomic friction. The consistency between the theoretical analysis and experimental result ultimately verify the validity of the assumption. The discovery of this paper promises future application in real-time crystallographic orientation detecting.
本文对二硫化钼的摩擦各向异性和原子摩擦的120度周期性变化进行了理论和实验研究。为了更清楚地阐明这些特性,利用Matlab软件对侧向摩擦实验中获得的实际摩擦信号波进行快速傅里叶变换(fast Fourier transform, FFT)进行频率变化。计算出的频率比随晶格取向周期性变化的特性被清楚地观察到,并在原子摩擦的周期性变化方面得到了很好的解释。理论分析与实验结果的一致性最终验证了假设的有效性。这一发现为在实时晶体取向检测方面的应用提供了前景。
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引用次数: 2
Digital electrostatic acoustic transducer array 数字静电声换能器阵列
A. Arevalo, D. Castro, D. Conchouso, J. Kosel, I. Foulds
In this paper we present the fabrication and characterization of an array of electrostatic acoustic transducers. The array is micromachined on a silicon wafer using standard micro-machining techniques. Each array contains 2n electrostatic transducer membranes, where “n” is the bit number. Every element of the array has a hexagonal membrane shape structure, which is separated from the substrate by 3μm air gap. The membrane is made out 5μm thick polyimide layer that has a bottom gold electrode on the substrate and a gold top electrode on top of the membrane (250nm). The wafer layout design was diced in nine chips with different array configurations, with variation of the membrane dimensions. The device was tested with 90 V giving and sound output level as high as 35dB, while actuating all the elements at the same time.
在本文中,我们提出了一组静电声换能器的制造和表征。该阵列采用标准的微加工技术在硅片上进行微加工。每个阵列包含2n个静电换能器膜,其中“n”为位位数。阵列的每个元件都具有六角形膜状结构,与衬底之间有3μm的气隙。该薄膜由5μm厚的聚酰亚胺层制成,在衬底上有一个底部金电极,在薄膜顶部有一个顶部金电极(250nm)。晶圆布局设计分为9个芯片,不同的阵列配置,不同的膜尺寸。该设备在同时驱动所有元件的情况下,以90v的电压和高达35dB的声音输出电平进行测试。
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引用次数: 3
Removal of aqueous metals from wastewater using porous functional heterocyclic aromatic amines 利用多孔功能杂环芳香族胺去除废水中的水金属
R. Hsu, Hung-Lun Liao, Pen-Cheng Wang
In this work, the applicability of poly aromatic amines (PAA) for the removal of gold, copper and palladium from various water samples has been investigated. Batch experiments were performed to realize the effect of relative nitrogen/carbon composition on the ability of PAA for removal of aqueous metals to achieve quantitative separation of metal. Besides, the effect of monomer structures on the morphology of polymerized aromatic amines was studied. Several polymerized aromatic amines were prepared by oxidative chemical. ICP-MS was used to determine the content of matals in the initial and final sample solutions to calculate metal uptake. The morphology was examined using scanning electron microscopy. Besides, the C/N ratio of the polymers was investigated by element analysis (EA).
本文研究了聚芳胺(PAA)对不同水样中金、铜和钯的去除率。通过批量实验研究了相对氮碳组成对PAA去除水中金属的能力的影响,实现了金属的定量分离。此外,还研究了单体结构对聚合芳胺形态的影响。采用氧化化学法制备了几种聚合芳胺。ICP-MS用于测定初始和最终样品溶液中材料的含量,以计算金属吸收率。用扫描电镜观察其形貌。此外,通过元素分析(EA)对聚合物的碳氮比进行了研究。
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引用次数: 1
A1 mode Lamb wave on thin LiTaO3 for high frequency acoustic devices 用于高频声学器件的薄LiTaO3上的A1模式Lamb波
Najoua Assila, M. Kadota, Y. Ohashi, Shuji Tanaka
The Lamb waves and horizontal shear waves' propagation in LiTaO3 thin plate is investigated as a function of Euler angles. Both velocity and electromechanical coupling factor largely depend on the plate's thickness. Around (0°, 30°, 0°), LiTaO3 thin plate has a high velocity and a suitable coupling factor for a high frequency filter. Authors fabricated A1 mode Lamb wave resonators in (0°, 39°, 0°) LiTaO3's thin plate. Lamb waves' velocities and leaky Lamb wave' velocities were measured by network analyzer and ultrasonic microscopy. Measured velocities correspond to the ones calculated by FEM. Velocities higher than 20,000 m/s were obtained. It is then shown that A1 mode Lamb wave close to (0°, 30°, 0°) LiTaO3 thin plate is suitable for high frequency devices.
研究了兰姆波和水平横波在LiTaO3薄板中的传播与欧拉角的关系。速度和机电耦合系数在很大程度上取决于板的厚度。在(0°,30°,0°)附近,LiTaO3薄板具有高速度和适合高频滤波器的耦合系数。作者在(0°,39°,0°)LiTaO3薄板上制备了A1模Lamb波谐振器。用网络分析仪和超声显微镜测量了兰姆波速度和漏兰姆波速度。实测速度与有限元计算速度一致。获得了高于20,000 m/s的速度。结果表明,靠近(0°,30°,0°)LiTaO3薄板的A1模兰姆波适用于高频器件。
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引用次数: 0
Design of a graphene capacitive pressure sensor for ultra-low pressure detection 用于超低压力检测的石墨烯电容式压力传感器的设计
Yangxi Zhang, Yiming Gui, Fanrui Meng, Chengchen Gao, Y. Hao
This paper reports the design and theoretical calculation of a capacitive ultra-low pressure sensor, which is based on circular suspend graphene diaphragm array. The atom scale thickness and high mechanical strength of suspend graphene diaphragm both contribute to ultra-low pressure measure range. As the size of single suspend graphene diaphragm is limited by fabrication process, a parallel connected sensor array is designed to achieve detectable capacitance change and redundancy. In calculation, a sensor array with 40,000 5μm radius suspend graphene diaphragm cells in 4mm×4mm size can provide 288fF/Pa sensitivity to pressure load.
本文报道了一种基于圆形悬浮石墨烯薄膜阵列的电容式超低压力传感器的设计和理论计算。悬浮石墨烯薄膜的原子级厚度和高机械强度都有助于超低压力的测量范围。针对单个悬浮式石墨烯膜片尺寸受制作工艺限制的问题,设计了并联连接的传感器阵列,实现了可检测的电容变化和冗余。在计算中,40,000个直径为5μm的悬浮石墨烯薄膜电池(4mm×4mm尺寸)的传感器阵列可以提供288fF/Pa的压力负载灵敏度。
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引用次数: 3
期刊
2016 IEEE 11th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)
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